[linux-2.6-block.git] / drivers / hwmon / da9052-hwmon.c

/*
 * HWMON Driver for Dialog DA9052
 *
 * Copyright(c) 2012 Dialog Semiconductor Ltd.
 *
 * Author: David Dajun Chen <dchen@diasemi.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/err.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>

#include <linux/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/reg.h>

struct da9052_hwmon {
	struct da9052	*da9052;
	struct mutex	hwmon_lock;
};

static const char * const input_names[] = {
	[DA9052_ADC_VDDOUT]	=	"VDDOUT",
	[DA9052_ADC_ICH]	=	"CHARGING CURRENT",
	[DA9052_ADC_TBAT]	=	"BATTERY TEMP",
	[DA9052_ADC_VBAT]	=	"BATTERY VOLTAGE",
	[DA9052_ADC_IN4]	=	"ADC IN4",
	[DA9052_ADC_IN5]	=	"ADC IN5",
	[DA9052_ADC_IN6]	=	"ADC IN6",
	[DA9052_ADC_TJUNC]	=	"BATTERY JUNCTION TEMP",
	[DA9052_ADC_VBBAT]	=	"BACK-UP BATTERY VOLTAGE",
};

/* Conversion function for VDDOUT and VBAT */
static inline int volt_reg_to_mv(int value)
{
	return DIV_ROUND_CLOSEST(value * 2000, 1023) + 2500;
}

/* Conversion function for ADC channels 4, 5 and 6 */
static inline int input_reg_to_mv(int value)
{
	return DIV_ROUND_CLOSEST(value * 2500, 1023);
}

/* Conversion function for VBBAT */
static inline int vbbat_reg_to_mv(int value)
{
	return DIV_ROUND_CLOSEST(value * 5000, 1023);
}

static inline int da9052_enable_vddout_channel(struct da9052 *da9052)
{
	return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
				 DA9052_ADCCONT_AUTOVDDEN,
				 DA9052_ADCCONT_AUTOVDDEN);
}

static inline int da9052_disable_vddout_channel(struct da9052 *da9052)
{
	return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
				 DA9052_ADCCONT_AUTOVDDEN, 0);
}

static ssize_t da9052_read_vddout(struct device *dev,
				  struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int ret, vdd;

	mutex_lock(&hwmon->hwmon_lock);

	ret = da9052_enable_vddout_channel(hwmon->da9052);
	if (ret < 0)
		goto hwmon_err;

	vdd = da9052_reg_read(hwmon->da9052, DA9052_VDD_RES_REG);
	if (vdd < 0) {
		ret = vdd;
		goto hwmon_err_release;
	}

	ret = da9052_disable_vddout_channel(hwmon->da9052);
	if (ret < 0)
		goto hwmon_err;

	mutex_unlock(&hwmon->hwmon_lock);
	return sprintf(buf, "%d\n", volt_reg_to_mv(vdd));

hwmon_err_release:
	da9052_disable_vddout_channel(hwmon->da9052);
hwmon_err:
	mutex_unlock(&hwmon->hwmon_lock);
	return ret;
}

static ssize_t da9052_read_ich(struct device *dev,
			       struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int ret;

	ret = da9052_reg_read(hwmon->da9052, DA9052_ICHG_AV_REG);
	if (ret < 0)
		return ret;

	/* Equivalent to 3.9mA/bit in register ICHG_AV */
	return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret * 39, 10));
}

static ssize_t da9052_read_tbat(struct device *dev,
				struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);

	return sprintf(buf, "%d\n", da9052_adc_read_temp(hwmon->da9052));
}

static ssize_t da9052_read_vbat(struct device *dev,
				struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int ret;

	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBAT);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%d\n", volt_reg_to_mv(ret));
}

static ssize_t da9052_read_misc_channel(struct device *dev,
					struct device_attribute *devattr,
					char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int channel = to_sensor_dev_attr(devattr)->index;
	int ret;

	ret = da9052_adc_manual_read(hwmon->da9052, channel);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%d\n", input_reg_to_mv(ret));
}

static ssize_t da9052_read_tjunc(struct device *dev,
				 struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int tjunc;
	int toffset;

	tjunc = da9052_reg_read(hwmon->da9052, DA9052_TJUNC_RES_REG);
	if (tjunc < 0)
		return tjunc;

	toffset = da9052_reg_read(hwmon->da9052, DA9052_T_OFFSET_REG);
	if (toffset < 0)
		return toffset;

	/*
	 * Degrees celsius = 1.708 * (TJUNC_RES - T_OFFSET) - 108.8
	 * T_OFFSET is a trim value used to improve accuracy of the result
	 */
	return sprintf(buf, "%d\n", 1708 * (tjunc - toffset) - 108800);
}

static ssize_t da9052_read_vbbat(struct device *dev,
				 struct device_attribute *devattr, char *buf)
{
	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	int ret;

	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBBAT);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%d\n", vbbat_reg_to_mv(ret));
}

static ssize_t show_label(struct device *dev,
			  struct device_attribute *devattr, char *buf)
{
	return sprintf(buf, "%s\n",
		       input_names[to_sensor_dev_attr(devattr)->index]);
}

static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, da9052_read_vddout, NULL,
			  DA9052_ADC_VDDOUT);
static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_VDDOUT);
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, da9052_read_vbat, NULL,
			  DA9052_ADC_VBAT);
static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_VBAT);
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, da9052_read_misc_channel, NULL,
			  DA9052_ADC_IN4);
static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_IN4);
static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, da9052_read_misc_channel, NULL,
			  DA9052_ADC_IN5);
static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_IN5);
static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, da9052_read_misc_channel, NULL,
			  DA9052_ADC_IN6);
static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_IN6);
static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, da9052_read_vbbat, NULL,
			  DA9052_ADC_VBBAT);
static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_VBBAT);

static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, da9052_read_ich, NULL,
			  DA9052_ADC_ICH);
static SENSOR_DEVICE_ATTR(curr1_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_ICH);

static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, da9052_read_tbat, NULL,
			  DA9052_ADC_TBAT);
static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_TBAT);
static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, da9052_read_tjunc, NULL,
			  DA9052_ADC_TJUNC);
static SENSOR_DEVICE_ATTR(temp8_label, S_IRUGO, show_label, NULL,
			  DA9052_ADC_TJUNC);

static struct attribute *da9052_attrs[] = {
	&sensor_dev_attr_in0_input.dev_attr.attr,
	&sensor_dev_attr_in0_label.dev_attr.attr,
	&sensor_dev_attr_in3_input.dev_attr.attr,
	&sensor_dev_attr_in3_label.dev_attr.attr,
	&sensor_dev_attr_in4_input.dev_attr.attr,
	&sensor_dev_attr_in4_label.dev_attr.attr,
	&sensor_dev_attr_in5_input.dev_attr.attr,
	&sensor_dev_attr_in5_label.dev_attr.attr,
	&sensor_dev_attr_in6_input.dev_attr.attr,
	&sensor_dev_attr_in6_label.dev_attr.attr,
	&sensor_dev_attr_in9_input.dev_attr.attr,
	&sensor_dev_attr_in9_label.dev_attr.attr,
	&sensor_dev_attr_curr1_input.dev_attr.attr,
	&sensor_dev_attr_curr1_label.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp2_label.dev_attr.attr,
	&sensor_dev_attr_temp8_input.dev_attr.attr,
	&sensor_dev_attr_temp8_label.dev_attr.attr,
	NULL
};

ATTRIBUTE_GROUPS(da9052);

static int da9052_hwmon_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct da9052_hwmon *hwmon;
	struct device *hwmon_dev;

	hwmon = devm_kzalloc(dev, sizeof(struct da9052_hwmon), GFP_KERNEL);
	if (!hwmon)
		return -ENOMEM;

	mutex_init(&hwmon->hwmon_lock);
	hwmon->da9052 = dev_get_drvdata(pdev->dev.parent);

	hwmon_dev = devm_hwmon_device_register_with_groups(dev, "da9052",
							   hwmon,
							   da9052_groups);
	return PTR_ERR_OR_ZERO(hwmon_dev);
}

static struct platform_driver da9052_hwmon_driver = {
	.probe = da9052_hwmon_probe,
	.driver = {
		.name = "da9052-hwmon",
	},
};

module_platform_driver(da9052_hwmon_driver);

MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("DA9052 HWMON driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9052-hwmon");
Commit	Line	Data
e41f6432 AJ	1	/*
	2	* HWMON Driver for Dialog DA9052
	3	*
	4	* Copyright(c) 2012 Dialog Semiconductor Ltd.
	5	*
	6	* Author: David Dajun Chen <dchen@diasemi.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*
	13	*/
	14
e41f6432 AJ	15	#include <linux/err.h>
	16	#include <linux/hwmon.h>
	17	#include <linux/hwmon-sysfs.h>
	18	#include <linux/init.h>
	19	#include <linux/kernel.h>
	20	#include <linux/module.h>
	21	#include <linux/slab.h>
	22	#include <linux/platform_device.h>
	23
	24	#include <linux/mfd/da9052/da9052.h>
	25	#include <linux/mfd/da9052/reg.h>
	26
	27	struct da9052_hwmon {
	28	struct da9052 *da9052;
e41f6432 AJ	29	struct mutex hwmon_lock;
	30	};
	31
	32	static const char * const input_names[] = {
	33	[DA9052_ADC_VDDOUT] = "VDDOUT",
	34	[DA9052_ADC_ICH] = "CHARGING CURRENT",
	35	[DA9052_ADC_TBAT] = "BATTERY TEMP",
	36	[DA9052_ADC_VBAT] = "BATTERY VOLTAGE",
	37	[DA9052_ADC_IN4] = "ADC IN4",
	38	[DA9052_ADC_IN5] = "ADC IN5",
	39	[DA9052_ADC_IN6] = "ADC IN6",
	40	[DA9052_ADC_TJUNC] = "BATTERY JUNCTION TEMP",
	41	[DA9052_ADC_VBBAT] = "BACK-UP BATTERY VOLTAGE",
	42	};
	43
	44	/* Conversion function for VDDOUT and VBAT */
088ce2ac	45	static inline int volt_reg_to_mv(int value)
e41f6432	46	{
c09088d9	47	return DIV_ROUND_CLOSEST(value * 2000, 1023) + 2500;
e41f6432 AJ	48	}
	49
	50	/* Conversion function for ADC channels 4, 5 and 6 */
088ce2ac	51	static inline int input_reg_to_mv(int value)
e41f6432 AJ	52	{
	53	return DIV_ROUND_CLOSEST(value * 2500, 1023);
	54	}
	55
	56	/* Conversion function for VBBAT */
088ce2ac	57	static inline int vbbat_reg_to_mv(int value)
e41f6432	58	{
c09088d9	59	return DIV_ROUND_CLOSEST(value * 5000, 1023);
e41f6432 AJ	60	}
e41f6432 AJ	61
d9b24e37	62	static inline int da9052_enable_vddout_channel(struct da9052 *da9052)
e41f6432	63	{
d9b24e37 AL	64	return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
	65	DA9052_ADCCONT_AUTOVDDEN,
	66	DA9052_ADCCONT_AUTOVDDEN);
e41f6432 AJ	67	}
e41f6432 AJ	68
d9b24e37	69	static inline int da9052_disable_vddout_channel(struct da9052 *da9052)
e41f6432	70	{
d9b24e37 AL	71	return da9052_reg_update(da9052, DA9052_ADC_CONT_REG,
d9b24e37 AL	72	DA9052_ADCCONT_AUTOVDDEN, 0);
e41f6432 AJ	73	}
	74
	75	static ssize_t da9052_read_vddout(struct device *dev,
	76	struct device_attribute devattr, char buf)
	77	{
	78	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	79	int ret, vdd;
	80
	81	mutex_lock(&hwmon->hwmon_lock);
	82
	83	ret = da9052_enable_vddout_channel(hwmon->da9052);
	84	if (ret < 0)
	85	goto hwmon_err;
	86
	87	vdd = da9052_reg_read(hwmon->da9052, DA9052_VDD_RES_REG);
	88	if (vdd < 0) {
	89	ret = vdd;
	90	goto hwmon_err_release;
	91	}
	92
	93	ret = da9052_disable_vddout_channel(hwmon->da9052);
	94	if (ret < 0)
	95	goto hwmon_err;
	96
	97	mutex_unlock(&hwmon->hwmon_lock);
088ce2ac	98	return sprintf(buf, "%d\n", volt_reg_to_mv(vdd));
e41f6432 AJ	99
	100	hwmon_err_release:
	101	da9052_disable_vddout_channel(hwmon->da9052);
	102	hwmon_err:
	103	mutex_unlock(&hwmon->hwmon_lock);
	104	return ret;
	105	}
	106
	107	static ssize_t da9052_read_ich(struct device *dev,
	108	struct device_attribute devattr, char buf)
	109	{
	110	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	111	int ret;
	112
	113	ret = da9052_reg_read(hwmon->da9052, DA9052_ICHG_AV_REG);
	114	if (ret < 0)
	115	return ret;
	116
	117	/* Equivalent to 3.9mA/bit in register ICHG_AV */
	118	return sprintf(buf, "%d\n", DIV_ROUND_CLOSEST(ret * 39, 10));
	119	}
	120
	121	static ssize_t da9052_read_tbat(struct device *dev,
	122	struct device_attribute devattr, char buf)
	123	{
	124	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	125
	126	return sprintf(buf, "%d\n", da9052_adc_read_temp(hwmon->da9052));
	127	}
	128
	129	static ssize_t da9052_read_vbat(struct device *dev,
	130	struct device_attribute devattr, char buf)
	131	{
	132	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	133	int ret;
	134
	135	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBAT);
	136	if (ret < 0)
	137	return ret;
	138
088ce2ac	139	return sprintf(buf, "%d\n", volt_reg_to_mv(ret));
e41f6432 AJ	140	}
	141
	142	static ssize_t da9052_read_misc_channel(struct device *dev,
	143	struct device_attribute *devattr,
	144	char *buf)
	145	{
	146	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	147	int channel = to_sensor_dev_attr(devattr)->index;
	148	int ret;
	149
	150	ret = da9052_adc_manual_read(hwmon->da9052, channel);
	151	if (ret < 0)
	152	return ret;
	153
088ce2ac	154	return sprintf(buf, "%d\n", input_reg_to_mv(ret));
e41f6432 AJ	155	}
	156
	157	static ssize_t da9052_read_tjunc(struct device *dev,
	158	struct device_attribute devattr, char buf)
	159	{
	160	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	161	int tjunc;
	162	int toffset;
	163
	164	tjunc = da9052_reg_read(hwmon->da9052, DA9052_TJUNC_RES_REG);
	165	if (tjunc < 0)
	166	return tjunc;
	167
	168	toffset = da9052_reg_read(hwmon->da9052, DA9052_T_OFFSET_REG);
	169	if (toffset < 0)
	170	return toffset;
	171
	172	/*
	173	* Degrees celsius = 1.708 * (TJUNC_RES - T_OFFSET) - 108.8
	174	* T_OFFSET is a trim value used to improve accuracy of the result
	175	*/
	176	return sprintf(buf, "%d\n", 1708 * (tjunc - toffset) - 108800);
	177	}
	178
	179	static ssize_t da9052_read_vbbat(struct device *dev,
	180	struct device_attribute devattr, char buf)
	181	{
	182	struct da9052_hwmon *hwmon = dev_get_drvdata(dev);
	183	int ret;
	184
	185	ret = da9052_adc_manual_read(hwmon->da9052, DA9052_ADC_VBBAT);
	186	if (ret < 0)
	187	return ret;
	188
088ce2ac	189	return sprintf(buf, "%d\n", vbbat_reg_to_mv(ret));
e41f6432 AJ	190	}
e41f6432 AJ	191
e41f6432 AJ	192	static ssize_t show_label(struct device *dev,
	193	struct device_attribute devattr, char buf)
	194	{
	195	return sprintf(buf, "%s\n",
	196	input_names[to_sensor_dev_attr(devattr)->index]);
	197	}
	198
	199	static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, da9052_read_vddout, NULL,
	200	DA9052_ADC_VDDOUT);
	201	static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL,
	202	DA9052_ADC_VDDOUT);
	203	static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, da9052_read_vbat, NULL,
	204	DA9052_ADC_VBAT);
	205	static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL,
	206	DA9052_ADC_VBAT);
	207	static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, da9052_read_misc_channel, NULL,
	208	DA9052_ADC_IN4);
	209	static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL,
	210	DA9052_ADC_IN4);
	211	static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, da9052_read_misc_channel, NULL,
	212	DA9052_ADC_IN5);
	213	static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL,
	214	DA9052_ADC_IN5);
	215	static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, da9052_read_misc_channel, NULL,
	216	DA9052_ADC_IN6);
	217	static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL,
	218	DA9052_ADC_IN6);
	219	static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, da9052_read_vbbat, NULL,
	220	DA9052_ADC_VBBAT);
	221	static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL,
	222	DA9052_ADC_VBBAT);
	223
	224	static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, da9052_read_ich, NULL,
	225	DA9052_ADC_ICH);
	226	static SENSOR_DEVICE_ATTR(curr1_label, S_IRUGO, show_label, NULL,
	227	DA9052_ADC_ICH);
	228
	229	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, da9052_read_tbat, NULL,
	230	DA9052_ADC_TBAT);
	231	static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL,
	232	DA9052_ADC_TBAT);
	233	static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, da9052_read_tjunc, NULL,
	234	DA9052_ADC_TJUNC);
	235	static SENSOR_DEVICE_ATTR(temp8_label, S_IRUGO, show_label, NULL,
	236	DA9052_ADC_TJUNC);
	237
4222eb5f	238	static struct attribute *da9052_attrs[] = {
e41f6432 AJ	239	&sensor_dev_attr_in0_input.dev_attr.attr,
	240	&sensor_dev_attr_in0_label.dev_attr.attr,
	241	&sensor_dev_attr_in3_input.dev_attr.attr,
	242	&sensor_dev_attr_in3_label.dev_attr.attr,
	243	&sensor_dev_attr_in4_input.dev_attr.attr,
	244	&sensor_dev_attr_in4_label.dev_attr.attr,
	245	&sensor_dev_attr_in5_input.dev_attr.attr,
	246	&sensor_dev_attr_in5_label.dev_attr.attr,
	247	&sensor_dev_attr_in6_input.dev_attr.attr,
	248	&sensor_dev_attr_in6_label.dev_attr.attr,
	249	&sensor_dev_attr_in9_input.dev_attr.attr,
	250	&sensor_dev_attr_in9_label.dev_attr.attr,
	251	&sensor_dev_attr_curr1_input.dev_attr.attr,
	252	&sensor_dev_attr_curr1_label.dev_attr.attr,
	253	&sensor_dev_attr_temp2_input.dev_attr.attr,
	254	&sensor_dev_attr_temp2_label.dev_attr.attr,
	255	&sensor_dev_attr_temp8_input.dev_attr.attr,
	256	&sensor_dev_attr_temp8_label.dev_attr.attr,
	257	NULL
	258	};
	259
4222eb5f	260	ATTRIBUTE_GROUPS(da9052);
e41f6432	261
6c931ae1	262	static int da9052_hwmon_probe(struct platform_device *pdev)
e41f6432	263	{
4222eb5f	264	struct device *dev = &pdev->dev;
e41f6432	265	struct da9052_hwmon *hwmon;
4222eb5f	266	struct device *hwmon_dev;
e41f6432	267
4222eb5f	268	hwmon = devm_kzalloc(dev, sizeof(struct da9052_hwmon), GFP_KERNEL);
e41f6432 AJ	269	if (!hwmon)
	270	return -ENOMEM;
	271
	272	mutex_init(&hwmon->hwmon_lock);
	273	hwmon->da9052 = dev_get_drvdata(pdev->dev.parent);
	274
4222eb5f AL	275	hwmon_dev = devm_hwmon_device_register_with_groups(dev, "da9052",
	276	hwmon,
	277	da9052_groups);
	278	return PTR_ERR_OR_ZERO(hwmon_dev);
e41f6432 AJ	279	}
	280
	281	static struct platform_driver da9052_hwmon_driver = {
	282	.probe = da9052_hwmon_probe,
e41f6432 AJ	283	.driver = {
e41f6432 AJ	284	.name = "da9052-hwmon",
e41f6432 AJ	285	},
	286	};
	287
	288	module_platform_driver(da9052_hwmon_driver);
	289
	290	MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
	291	MODULE_DESCRIPTION("DA9052 HWMON driver");
	292	MODULE_LICENSE("GPL");
	293	MODULE_ALIAS("platform:da9052-hwmon");